大乘起信論義記 3.220

3.220

問：若真心即是佛者，何故下文云「從諸波羅蜜等因生」？答：此約本覺隨緣義說。然其始覺覺至心源，平等一際，有何差別？上來約終教說。若約始教說者，即以諸佛悲智為增上緣，眾生機感種子為因緣，故託佛本質上，自心變影像，故云在自識中現也。餘如《瑜伽》、《唯識》等論說。

Question: If the true mind is precisely the Buddha, why does the text below say "born from causes such as the pāramitās"? Answer: This is spoken with regard to the meaning of innate enlightenment according with conditions. Yet when incipient enlightenment awakens to the source of the mind, it is equal and of one plane; what difference could there be? The above is spoken with regard to the final teaching. If spoken with regard to the initial teaching: using the compassion and wisdom of all Buddhas as the predominant condition, and sentient beings' receptive capacities and seeds as the causal condition, relying on the Buddha's fundamental substance, their own minds transform images; hence it is said to manifest in their own consciousness. The rest is as explained in treatises such as the Yogācārabhūmi and Vijñaptimātratā.